Composite Decking and Heat: Does It Really Matter?
When summer hits in Perth, everything heats up — the pavement, concrete, pavers, and yes, your decking. It’s one of the most common questions we hear: “Does composite decking get too hot?” The short answer? It can. But so does just about everything else when the sun’s blazing. The real difference lies in how quickly each surface heats up, how it holds that heat, and how you use your space.
Trex Lineage Series - Composite Decking in Rainer Colour
Dianella, 2025
Composite vs. Timber: What Happens in the Heat
Composite decking, made from a blend of recycled wood fibres and plastics, tends to absorb and retain heat faster than natural timber. That’s because plastic conducts heat differently, it warms quickly under direct sunlight and cools down more slowly once the shade returns.
Timber, on the other hand, heats up more gradually and usually cools faster. That doesn’t mean it stays cool. On a 35°C Perth day, any material exposed to direct sun will be hot to the touch. The key is understanding how each behaves, and how design choices can make a difference.
Design Matters More Than the Material
When planning your deck, the heat factor isn’t just about what it’s made of — it’s about where and how it’s built. A few smart design decisions can keep things far more comfortable:
Choose lighter colours: Darker composites absorb more heat. Go for lighter, natural tones to reflect more sunlight.
Use shade wisely: Incorporate pergolas, umbrellas, or strategically placed plants to reduce direct sun exposure.
Plan airflow: Open designs with good ventilation under the deck help heat dissipate faster.
These small design tweaks can make a huge difference, especially in Perth’s dry, radiant heat.
Safety Around Pools and Kids
If your deck wraps around a pool or play area, temperature matters even more. Composite decking can become hot under bare feet, especially for children. The same is true for concrete or tiles, but composites retain heat longer.
When working on pool surrounds, we often recommend:
Lighter-coloured decking boards
Plenty of shaded areas
Non-slip, heat-reflective materials when possible
The goal isn’t to avoid composite decking, it’s to plan for its characteristics. When used thoughtfully, it’s durable, low-maintenance, and beautiful.
The Real Takeaway
Everything gets hot in the Perth sun. Composite just does it a little faster. The trick isn’t to fear the material — it’s to design intelligently around it. With the right layout, colour choices, and shading, composite decking performs beautifully even through summer’s peak.
At Lesgoconstruction, we’ve built hundreds of decks across Perth’s toughest conditions. We know how to balance design, materials, and craftsmanship to make your outdoor space both functional and comfortable — all year round.
Thinking about a new deck or outdoor renovation?
Reach out for expert advice or a free consultation to find the perfect solution for your home or commercial space.